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METHODS OF COVALENT FUNCTIONALIZATION AND THEIRS INFLUENCE ON THE MICROSTRUCTURE OF THERMOEXFOLIATED GRAPHITE

机译:共价官能化方法及其对热剥离石墨微观结构的影响

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Nanocarbon in all its forms (carbon nanotubes, nanographite, thermoexfoliated graphite (TEG)) does not form dispersions or solutions in organic solvents and water. Nanocarbon particles, including CNTs, are prone to aggregation and formation of bundles and matted nets due to the relatively strong Van der Waals long-range interaction, which occurs between separate nanocarbon particles. However, the implementation of a stable homogeneous dispersion of particles in a polymer nanocarbon matrix is the most important issue in the creation of polymer composites with homogeneous structure. One can use two ways to realize a uniform distribution of nanocarbon component in the polymer matrix: mechanical and chemical processing methods for nanocarbon component. Physical separation of nanocarbon particles is realized by mechanical treatment. When nanocarbon interacts with some substances such as oxygen, fluorine, ozone, oxygen-containing acids and salts some functional groups join nanocarbon surface. Functional groups on the nanocarbon surface modify that surface properties, create conditions for a homogeneous distribution of nanocarbon filler in a polymer matrix, and provide a strong bond between filler particles and polymer matrix [1,2].
机译:所有形式的纳米碳(碳纳米管,纳米图形,热拔出石墨(TEG))都不会在有机溶剂和水中形成分散体或溶液。由于相对强大的范德华的远程相互作用,纳米碳颗粒(包括CNT)易于聚集和形成捆绑和粘土网,这在单独的纳米碳颗粒之间发生。然而,在聚合物纳米碳基质中的颗粒稳定均匀分散的实施是在具有均匀结构的聚合物复合材料中产生最重要的问题。人们可以使用两种方法来实现聚合物基质中纳米碳组分的均匀分布:纳米碳组分的机械和化学加工方法。通过机械处理实现纳米碳颗粒的物理分离。当纳米碳与一些物质相互作用时,含氟,臭氧,含氧的酸和一些官能团加入纳米碳表面。纳米碳表面上的官能团改变该表面性质,在聚合物基质中产生纳米碳填料的均匀分布的条件,并在填充颗粒和聚合物基质之间提供强键[1,2]。

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